Remember, each 36 count box includes BOTH series. It's our way of providing you DOUBLE the value in these tight times! You'll get a full base set of both series (all 100) in each box. However, if you want to get all 51 parallel 3D cards (one per pack), and both varieties of sketch cards, you'll need two boxes. That way you will get a master set of all the cards (we'll make sure of it).